adding validated services? patching forcad_local.py

OmCTF-2025/services/block_game/backend/Dockerfile

@@ -0,0 +1,22 @@
+FROM golang:1.25.1-bookworm AS builder
+
+WORKDIR /src
+
+COPY go.mod go.sum ./
+RUN --mount=type=cache,target=/root/.cache/go-build \
+    --mount=type=cache,target=/go/pkg/mod \
+    go mod download
+
+COPY . .
+
+RUN --mount=type=cache,target=/root/.cache/go-build \
+    CGO_ENABLED=0 GOOS=linux GOARCH=amd64 \
+    go build -ldflags "-s -w" -o /out/ ./...
+
+FROM gcr.io/distroless/static-debian11:nonroot
+
+COPY --from=builder /out/block-game-backend /usr/local/bin/block-game-backend
+
+USER nonroot:nonroot
+
+ENTRYPOINT ["/usr/local/bin/block-game-backend"]